I'm probably reading into it too much, but I'm guessing that the whole point of this story (albeit looooong and winding and frustrating) is to show that everybody, and anybody, are the main characters of their own story. Even though you are a plain jane mob, you still have a backstory, and unlike what most stories potray, where minor characters are just scene fillers and no one cares about them after the scene, the seemingly minor characters all have some ties to the main characters, and they do have personalities too. Just like Dani, who thinks she's just playing a support role in a fictional world, her existence has a major impact on her friends and the world itself. Just like how you feel like an insignificant dot in an ever more fucked up world, you have made your own trails here and there, and have impacted society in some way. You are important, and you have your own story to write out, and whatever the outcome, just know that people know you, and you are equally significant as anybody else.
Story wise, it got me hooked but it just got more and more frustdating. I'll follow till the end tho! Thanks for translating!!